Portable speaker



FIG. 1 is a top, front perspective view of a portable speaker, showing my new design;

FIG. 2 is a bottom, front perspective view of the portable speaker;

FIG. 3 is a top, rear perspective view of the portable speaker;

FIG. 4 is a bottom, rear perspective view of the portable speaker;

FIG. 5 is a front elevation view of the portable speaker;

FIG. 6 is a rear elevation view of the portable speaker;

FIG. 7 is a top plan view of the portable speaker;

FIG. 8 is a bottom plan view of the portable speaker; and,

FIG. 9 is a left elevation view of the portable speaker.

The broken lines in the figures illustrate the portions of design that form no part of the claimed design. 

CLAIM The ornamental design for a portable speaker, as shown and described. 